ES2364230T3 - USE OF THERMOPLASTIC MOLDABLE MATERIALS FOR GAS OR WATER INJECTION PROCESSES. - Google Patents

Abstract

Use of thermoplastic molding compositions comprising A) from 10 to 89% by weight of a polyethylene terephthalate which can comprise up to 65% by weight, based on 100% by weight of A), of another polyester, B) from 0.01 to 50% by weight of B1) at least one highly branched or hyperbranched polycarbonate with an OH number of from 1 to 600 mg KOH/g of polycarbonate (to DIN 53240, part 2), or B2) at least one highly branched or hyperbranched polyester of AxBy type, where x is at least 1.1 and y is at least 2.1, or a mixture of these, C) from 10 to 60% by weight of a fibrous or particulate filler, and D) from 0 to 20% by weight of further additives, where the total of the percentages by weight of components A) to D) is 100%, for the production of moldings by means of the internal-gas-pressure process and/or the water-injection process.

Description

The present invention comprises the use of thermoplastic moldable materials containing

A) 10 to 89% by weight of a polyethylene terephthalate which may contain up to 65% by weight with respect to 100% by weight of A), of another polyester.

B) 0.01 to 50% by weight

B1) at least one highly branched or hyperbranched polycarbonate with an OH number of 1 to 600 mg KOH / g of polycarbonate (according to DIN 53240, part 2), or

B2) at least one highly branched or hyperbranched polyester of the AxBy type in which x has a value of at least 1.1 e and at least 2.1, or mixtures thereof

C) 10 to 60% by weight of filler material in the form of fibers or particles,

D) 0 to 20% by weight of other additional substances,

wherein the sum of the percentages by weight of components A) to D) is a total of 100%,

for obtaining molded bodies by means of an internal gas pressure process and / or a water injection process.

To improve fluidity, low molecular weight additives are usually added to thermoplastics. However, the effect of such additives is very limited, since, for example, the reduction of mechanical characteristics is no longer tolerated by increasing the amount of additive addition.

Dendritic polymers with a perfectly symmetrical structure, the so-called dendrimers, can be obtained from a central molecule, through controlled gradual bonds of, respectively, two or more di or polyfunctional monomers with each monomer already bound. In that case, with each linkage step the number of the terminal monomeric groups is increased exponentially (and thus, the bonds), and polymers with tree-like structures are obtained, in an ideal case, in the form of spherical whose branches contain, in each case, exactly the same amount of monomer units. Due to said perfect structure, the polymer characteristics are advantageous, for example, a surprisingly low viscosity and high reactivity are observed, due to the large number of functional groups on the surface of the sphere. However, obtaining is difficult due to the fact that in each connection step protective groups are incorporated and must be removed again and cleaning operations are required, whereby dendrimers are usually only manufactured on a laboratory scale.

However, with a process on an industrial scale, highly branched or hyperbranched polymers can be obtained in a simple manner. In addition to the perfect dendritic structures, they also have linear polymer chains and uneven polymeric branches, which, in spite of this, in general does not significantly deteriorate the polymer characteristics compared to those of the perfect dendrimers. Hyperbranched polymers can be obtained in two synthesis processes known as AB2 and Ax + By. In them, Ax and By represent different monomers and the x and y indices indicate the amount of functional groups contained in A or B, respectively, that is, the functionalities of A or B. In the AB2 path a trifunctional monomer is converted with a group reagent A and two reactive groups B in a highly branched or hyperbranched polymer. In the case of the synthesis Ax and By, represented in the example of the synthesis A2 + B3, a difunctional monomer A2 is converted with a trifunctional monomer B3. In that case, first, a 1: 1 adduct of A and B is obtained with a functional group A and two functional groups B in the agent, said adduct may eventually react and transform into a highly branched or hyperbranched polymer.

From WO-97/45474 thermoplastic compounds containing dendrimeric polyesters are known as AB2 molecule in a polyester. In this case, a polyfunctional alcohol reacts as a nuclear molecule with dimethylpropionic acid as an AB2 molecule to obtain a dendrimer polyester. It only contains OH functionalities at the end of the chain. The disadvantage of these mixtures is the high glass transition temperature of the dendrimer polyester, the comparatively expensive manufacturing and, above all, the poor solubility of the dendrimers in the polyester matrix.

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According to the proposal of the report DE-A 101 32 928, the incorporation of said branching agents by means of manufacturing and subsequent solid phase condensation causes an improvement in mechanics (molecular weight conformation). The disadvantage of the process variant described is the long processing time, as well as the disadvantageous features already listed.

In WO 2005/075565 and WO 2005/075563, new additives have already been proposed to improve the flow for polyesters. Due to the significantly slower crystallization behavior, it is essential for PETs to improve the processing behavior for specific uses, especially moldable polyester materials that have a high amount of filler material (high stiffness).

Therefore, the present invention aims to present thermoplastic moldable materials that have good fluidity and, at the same time, high rigidity and strength.

In addition, the moldable polyester materials must have a good quality and uniform surface in the case of the manufacture of molded parts of gas or water injection (in the posibile, a reduced amount of the so-called "rechupes") and a good coating with, for example, powder varnishes at elevated temperatures.

According to this, the uses of moldable materials defined at the beginning were found. Preferred uses are apparent from the subclaims.

As component (A), the moldable materials according to the invention contain 10 to 89, preferably 10 to 69 and especially preferably, 10 to 59% by weight of at least one thermoplastic PET (polyethylene terephthalate).

This PET may contain up to 65% by weight, relative to 100% by weight of A), preferably up to 30% by weight of another polyester other than PET.

In general, polyesters A) based on aromatic dicarboxylic acids and an aliphatic or aromatic dihydroxy compound are used.

A first group of preferred polyesters are polyalkylene terephthalates, especially those with 2 to 10 C atoms per alcohol.

Such polyalkylene interphthalates are known and are also described in the literature. They contain an aromatic ring in the main chain, from aromatic dicarboxylic acid. The aromatic ring can also be substituted, for example, by a halogen such as chlorine and bromine, or by a C1-C4 alkyl groups, such as methyl, ethyl, i- or n-propyl and n-, i-, or t-butyl groups.

These polyalkylene terephthalates can be made in a known manner, from the conversion of aromatic dicarboxylic acids whose esters or other derivatives that form esters with aliphatic dihydroxy compounds.

As preferred dicarboxylic acids, we will mention 2,6-naphthalene dicarboxylic acid, terephthalic acid and isophthalic acid or mixtures thereof. Up to 30% by mole, preferably, no more than 10% by mole of the aromatic dicarboxylic acids can be replaced by aliphatic or ciloaliphatic dicarboxylic acids such as adipinic acid, azelaic acid, sebacic acid, dodecanedioic acid and cyclohexandicarboxylic acids.

Of the aliphatic dihydroxy compounds, diols with 2 to 6 carbon atoms are preferred, especially 1,2etandiol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, 1,4-hexanediol, 1,4- cyclohexanediol, 1,4-cyclohexanedimethanol and neopentyl glycol or mixtures thereof.

As especially preferred polyesters (A) we will mention the polyalkylene interphthalates, derived from alkanols with 2 to 6 C atoms. Of these, polyethylene terephthalate, polypropylene terephthalate and polybutylene terephthalate or mixtures thereof are especially preferred. In addition, PET and / or PBT are preferred, containing up to 1% by weight, preferably up to 0.75% by weight of 1,6-hexanediol and / or 2-methyl-1,5-pentandiol as monomer units. additional.

The viscosity index of the polyesters (A) is, in general, in the range of 50 to 220, preferably 80 to 160 (measured in a 0.5% solution by weight in a phenol / o- mixture dichlorobenzene (weight ratio of

1: 1 at 25 ° C) conforming to ISO 1628.

Especially preferred are polyesters whose carboxyl group content is up to 100 mval / kg, preferably up to 50 mval / kg and, preferably, especially, up to 40 mval / kg of polyesters. Such polyesters can be made, for example, according to the procedure of memory DE-A 44 01 055. The

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Carboxyl group content is usually determined through a titration procedure (eg, potentiometry).

In addition, it is advantageous to use, eventually, recycled PET material (also called scrap-PET) in the mixture with polyalkylene terephthalates as PBT.

Under recycled material we understand, in general:

1) the so-called post-industrial recycled materials: these are production wastes obtained in the polycondensation or during the processing, for example, of drinking troughs in the injection molding treatment, raw material of the injection molding or extrusion treatment, or cuts of the edges of plates or extruded films.

2) Post consumer recycled materials: in this case, these are plastic items that are collected and processed after use by the consumer. The items that predominate widely, as far as quantity is concerned, are PET blow molded bottles for mineral water, soft drinks and juices.

Both types of recycled material can be presented in the form of ground material or in the form of granules. In the latter case, after separation and cleaning, the raw recycled materials are melted and granulated in an extruder. In this way, in general, the treatment, the bleed and the dosage for the other procedural steps are simplified.

The recycled materials present, whether granulated or as ground material, can be used with maximum edge lengths less than 10 mm, preferably less than 8 mm.

Due to the hydrolytic fission of the polyesters during processing (due to traces of moisture) it is recommended to dry the recycled material beforehand. The moisture residues after drying are preferably <0.2%, particularly preferably, <0.05%.

As another group we can mention the completely aromatic polyesters that are released from aromatic dicarboxylic acids and aromatic dihydroxy compounds.

Compounds already described in polyalkylene terephthalates are suitable as aromatic dicarboxylic acids. Mixtures of 5 to 100% in mol of isophthalic acid and 0 to 95% in mol of terephthalic acid are preferred, especially mixtures of approximately 80% terephthalic acid with 20% isophthalic acid, to approximately equivalent mixtures of Both acids.

The aromatic dihydroxy compounds preferably have the general formula

image 1

in which Z represents an alkylene or cycloalkylene group with up to 8 C atoms, an arylene group with up to 12 C atoms, a carbonyl group, a sulfonyl group, an oxygen or sulfur atom or a chemical bond and m has the value 0 to 2. The compounds may also carry, in the phenylene groups, C1-C6 alkyl or alkoxy groups and fluorine, chlorine or bromine as substituents.

As the parent substance of these compounds we will mention, for example, dihydroxydiphenyl, di- (hydroxyphenyl) alkane, di- (hydroxyphenyl) cycloalkane, di- (hydroxyphenyl) sulfide, di- (hydroxyphenyl) ether, di- (hydroxyphenyl) ketone,

di- (hydroxyphenyl) sulfoxide, α, α’-di- (hydroxyphenyl) -dialkylbenzene, di- (hydroxyphenyl) sulfone, di- (hydroxybenzoyl) benzene

5 resorcinates e hydroquinone, as well as its derivatives of alkylated nucleus or halogenated nucleus. Among them they prefer 4,4’-dihydroxydiphenyl, 2,4-di- (4’-hydroxyphenyl) -2-methylbutane,

10 α, α'-di- (4-hydroxyphenyl) -p-diisopropylbenzene, 2,2-di- (3'-methyl-4'-hydroxyphenyl) propane and 2,2-di- (3'-chloro-4 '-hydroxyphenyl) propane, as well as, especially, 2,2-di- (4'-hydroxyphenyl) propane,

2,2-di- (3 ', 5'-dichlorohydroxyphenyl) propane, 1,1-di- (4'-hydroxyphenyl) cyclohexane, 3,4'-dihydroxybenzophenone, 4,4'-dihydroxy diphenylsulfone and 2,2- di (3 ', 5'-dimethyl-4'-hydroxyphenyl) propane

20 or mixtures thereof. Naturally, mixtures of polyalkylene terephthalates and completely polyesters can also be used.

aromatic These generally contain 20 to 98% by weight of polyalkylene terephthalate and 2 to 80% by weight of fully aromatic polyesters. Naturally, polyester block copolymers can also be used as copolyether esters. This type

25 of products are known and are described in the literature, for example, in USA 3 651 014.

Corresponding products can also be purchased commercially, for example, Hytrel® (DuPont). As polyesters, according to the invention, halogen-free polycarbonates are also understood. Suitable halogen-free polycarbonates are, for example, those based on diphenols, of the general formula

image 1

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wherein Q represents a single bond, a C1 to C8 alkylene group, a C2 to C3 alkylidene group, a C3 to C6 cycloalkylidene group, a C6 to C12 arylene group, and also means -O-, -So -SO2 -y m is an integer from 0 to 2.

Diphenols may also have substituents such as C1 to C6 alkyl or C1 to C6 alkoxy in phenylene radicals.

Preferred diphenols of the formula are, for example, hydroquinone, resorcin, 4,4'-dihydroxydiphenyl, 2,2-bis- (4-hydroxyphenyl) -propane, 2,4-bis- (4-hydroxyphenyl) -2-methylbutane, 1,1-bis- (4-hydroxyphenyl) -cyclohexane. Especially preferred is 2,2-bis- (4-hydroxyphenyl) -propane and 1,1-bis- (4-hydroxyphenyl) -cyclohexane, as well as 1,1-bis- (4-hydroxyphenyl) -3,3 , 5-trimethylcyclohexane.

Both homopolycarbonates and polycarbonates are suitable as components A, in addition to bisphenol A homopolymer, bisphenol A copolycarbonates are preferred.

Suitable polycarbonates may be branched in a known manner, namely, preferably, by the incorporation of 0.05 to 2.0% in mol, in relation to the sum of the diphenols implemented, of at least three-functional compounds, for example , those with three or more than three phenolic OH groups.

Polycarbonates having relative viscosities nrel from 1.10 to 1.50, especially 1.25 to 1.40, were especially suitable. This corresponds to the average molecular weights Mw (average weight value) of 10,000 to 200,000, preferably 20,000 to 80,000 g / mol.

Diphenols of the general formula are known, or can be made according to known procedures.

Obtaining the polycarbonates can be carried out, for example, by converting diphenols with phosgene, according to the interphase procedure, or with phosgene, according to the homogeneous phase procedure (the so-called pyridine procedure), also the molecular weight respective to regular is obtained, in a known manner, through a corresponding amount of chain switches. (for polycarbonates containing polydiorganosiloxane, see, for example, DE-OS 33 34 782).

Suitable chain switches are, for example, phenol, pt-butylphenol, but also long chain alkylphenols, such as 4- (1,3-tetramethyl-butyl) -phenol, according to DE-OS 28 42 005, or monoalkylphenols or dialkylphenols with a total of 8 to 20 C atoms in the alkyl substituents, according to DE-A 35 06 472, such as p-nonylphenol, 3,5-di-t-butylphenol, pt-octylphenol, p- dodecylphenol, 2- (3,5-dimethyl-heptyl) -phenol and 4- (3,5-dimethylheptyl) phenol.

Halogen-free polycarbonates, within the meaning of the present invention, mean that the polycarbonates are composed of halogen-free diphenols, halogen-free chain switches and, possibly, halogen-free branching agents, also, the amount of ppm amounts of chlorine Saponifiable, which results, for example, from the manufacture of polycarbonates with phosgene, according to the interphase procedure, cannot be considered halogen content, within the meaning of the invention. This type of polycarbonates with ppm contents of saponifiable chlorine are halogen-free polycarbonates, within the meaning of the present invention.

As another suitable component A) we will mention the amorphous polyester carbonates, likewise, during processing the phosgene was replaced by aromatic dicarboxylic acid units, such as isophthalic acid and / or terephthalic acid units. For more details, refer to memory EP-A 711 810.

Other suitable copolycarbonates with cycloalkyl radicals as monomer units are described in EP-A 365 916.

In addition, bisphenol A can be replaced with bisphenol TMC. This type of polycarbonate can be purchased under the trade name APEC HT®, from the company Bayer.

As component B), the moldable materials according to the invention contain 0.01 to 50, preferably 0.1 to 10 and, especially, 0.1 to 5% by weight, of B1) at least one highly branched polycarbonate or hyperbranched with an OH number of 1 to 600 mg, preferably 10 to 550 and, especially, 50 to 550 mgKOH / g of polycarbonate (according to DIN 53240, part 2), or at least one hyperbranched polyester as component B2 ) or their mixtures, as detailed below.

In the context of this invention, hyperbranched polycarbonate B1) means macromolecules not cross-linked with hydroxyl and carbonate groups that are not unitary either structurally or molecularly. On the one hand, they can be formed from a central molecule, analogously to dendrimers, but with unified chain length of branches. On the other hand, they can also be linearly shaped, with functional side groups, or as a combination of both ends, have linear and branched parts of the

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molecule. For the definition of dendrimer and hyperbranched polymers see also P.J. Flory, J. Am. Chem. Soc. 1952, 74, 2718 and H. Frey et al., Chem. Eur. J. 2000, 6, no 14, 2499.

By "hyperbranched" is understood, in relation to the present invention, that the degree of branching (degree of branching, DB), that is, the average amount of dendritic bonds plus the average number of terminal groups per molecule is 10 to 99 , 9%, preferably, from 20 to 99%, especially preferably, from 20 -95%.

By "dendrimer" it is understood, in relation to the present invention, that the degree of branching is 99.9-100%. For the definition of "degree of branching" see H. Frey et al., Acta Polym. 1997, 48, 30.

The degree of branching DB (degree of branching) of the corresponding substances is defined as

image 1

(where T is the average number of terminal monomer units, Z, the average amount of branched chain monomer units and L, the average number of linear monomer units in the macromolecules of the respective substances).

Preferably, component B1) has a numerical average of the molecular weight Mn of 100 to 15 000, especially preferably, 200 to 12 000 and, especially, 500 to 10 000 g / mol (GPC, PMMA standard).

The glass transition temperature Tg is especially from -80 -C to +140, preferably from -60 to 120 ˚C (according to CDD, DIN 53765).

The viscosity (mPas) at 23 ° C (according to DIN 53019) is 50 to 200,000, especially 100 to 150,000 and, especially preferably, 200 to 100,000.

Component B1) can be obtained, preferably, by a method comprising at least the following steps:

a) conversion of at least one organic carbonate (A) of the general formula RO [(CO)] nOR with at least one aliphatic, aliphatic / aromatic or aromatic alcohol (B), which has at least 3 OH groups, eliminating ROH alcohols, to obtain one or multiple condensation products (K), likewise, in the case of R it is, in each case, independently of each other, a straight chain or branched chain aliphatic hydrocarbon radical , aliphatic / aromatic or aromatic with 1 to 20 C atoms, likewise, the radicals R can also be linked together forming a ring and n represents an integer between 1 and 5, or

ab) conversion of phosgene, diphosgene or triphosgene with the mentioned alcohol (B) eliminating hydrogen chloride as well as

b) intermolecular conversion of the condensation products (K) obtaining a highly functional, highly branched or hyperbranched polycarbonate, also, the proportion of the OH groups with respect to the carbonates in the reaction mixture is selected such that the products of condensation (K) in the agent present, or

a carbonate group and more than one OH group, or an OH group and more than one carbonate group.

As the starting material phosgene, diphosgene or triphosgene can be used, likewise, organic carbonates are preferred.

In the case of the radicals R of the organic carbonates (A) of the general formula RO (CO) OR, used as the starting material, it is, in each case, independently of each other, a straight chain or chain hydrocarbon radical branched, aliphatic, aromatic / aliphatic or aromatic with 1 to 20 C atoms. Both R radicals can also be linked together forming a ring. Preferably, it is an aliphatic hydrocarbon radical and, especially preferably, a straight chain or branched chain alkyl radical with 1 to 5 C atoms,

or of a substituted or unsubstituted phenyl radical.

In particular, simple carbonates of the formula RO (CO) nOR are used; n is preferably 1 to 3, especially 1.

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The dialkyl or diaryl carbonates may, for example, be manufactured from the reaction of aliphatic, araliphatic or aromatic alcohols, preferably monoalcohols with phosgene. In addition, they can also be obtained through carbonization of alcohols or phenols by CO in the presence of noble metals, oxygen or NOx. For the methods of manufacturing diaryl or dialkyl carbonates see also "Ullmann's Encyclopedia of Industrial Chemistry", 6th edition, 2000, electronic edition, Editorial Wiley-VCH.

Examples of suitable carbonates include aliphatic, aromatic / aliphatic or aromatic carbonates, such as ethylene carbonate, 1,2- or 1,3-propylene carbonate, diphenyl carbonate, ditolyl carbonate, dixylyl carbonate, dinaphthyl carbonate, ethylphenyl carbonate, dibenzyl carbonate, dimethyl carbonate, diethyl carbonate, dipropyl carbonate, dibutyl carbonate, diisobutyl carbonate, dipentyl carbonate, dihexyl carbonate, dicyclohexyl carbonate, diheptyl carbonate, dioctyl carbonate, didecyl or didodecyl carbonate.

Examples of carbonates in which n is greater than 1, comprise dialkyl dicarbonates, such as di (-butyl) dicarbonate or dialkyl tricarbonates, such as di (-t-butyl) tricarbonate.

Preferably, aliphatic carbonates are used, especially those in which the radicals comprise 1 to 5 C atoms, for example, dimethyl carbonate, diethyl carbonate, dipropyl carbonate, dibutyl carbonate or diisobutyl carbonate.

Organic carbonates are converted with at least one aliphatic alcohol (B), which has at least 3 OH groups

or mixtures of two or multiple different alcohols.

Examples of compounds with at least three OH groups include glycerin, trimethylolmethane, trimethylolethane, trimethylolpropane, 1,2,4-butantriol, tris (hydroxymethyl) amine, tris (hydroxyethyl) amine, tris (hydroxypropyl) amine, pentaerythrite, diglycerin , triglycerin, polyglycerin, tris (hydroxymethyl) isocyanurate, tris (hydroxyethyl) isocyanurate, floroglucinol, trihydroxytoluene, trihydroxydimethylbenzene, floroglucids, hexahydroxybenzene, 1,3,5-benzeotrimethanol, 1,1,1-trifen (4'hydro) , 1,1-tris (4'-hydroxyphenyl) ethane, bis (tri-methylolpropane) or sugars, for example, glucoses, trifunctional or higher polyetherols, based on trifunctional alcohols and ethylene oxide, propylene oxide or butylene oxide , or polyester. In turn, glycerin, trimethylolethane, trimethylolpropane, 1,2,4-butanedriol, pentaerythritol, and their polyetherols based on ethylene oxide or propylene oxide are especially preferred.

Such polyfunctional alcohols can also be used in a mixture with difunctional alcohols (B '), with the indication that the average OH functionality of all the alcohols used is greater than 2. Examples of suitable compounds with two OH groups comprise ethylene glycol, diethylene glycol, triethylene glycol , 1,2-and 1,3-propanediol, dipropylene glycol, tripropylene glycol, neopentyl glycol, 1,2-, 1,3-and 1,4-butanediol, 1,2-, 1,3-and 1,5-pentandiol, hexandiol, cyclopentandiol, cyclohexandiol, cyclohexandimethanol, bis (4-hydroxycyclohexyl) methane, bis (4-hydroxycyclohexyl) ethane, 2,2-bis (4-hydroxycyclohexyl) propane, 1,1'-bis (4-hydroxyphenyl) -3,30,5- trimethylcyclohexane, resorcinol, hydroquinone, 4,4'-dihydroxyphenyl, bis- (4-bis (hydroxyphenyl) sulfide, bis (4-hydroxyphenyl) sulfone, bis (hydroxymethyl) benzene, bis (hydroxymethyl) toluene, bis (p-hydroxyphenyl) methane, bis (p-hydroxyphenyl) ethane, 2,2-bis (p hydroxyphenyl) propane, 1,1-bis (p-hydroxyphenyl) cyclohexane, dihydroxybenzophenone, difuncio polyether polyols based on ethylene oxide, propylene oxide, butylene oxide or mixtures thereof, polytetrahydrofuran, polycaprolactone or polyetherols based on diols and dicarboxylic acids.

The diols are used for fine adjustment of the characteristics of polycarbonate. In the case that difunctional alcohols are used, the ratio of difunctional alcohols B ’) to at least trifunctional alcohols (B), are set by the specialist according to the desired characteristics of polycarbonate. In general, the amount of the alcohol (B ’) is 0 to 39.9% in mol in relation to the total amount of all alcohols (B) and (B’) together. Preferably, said amount is from 0 to 35% by mole, preferably, from 0 to 25% by mole and, especially preferably, from 0 to 10% by mole.

The reaction of phosgene, diphosgene or triphosgene with the alcohol or the mixture of alcohol is carried out, in general, eliminating hydrogen chloride, the reaction of the carbonates with the alcohol or the mixture of alcohol to obtain the polycarbonate of high functionality, Highly branched, according to the invention, is carried out by removing the monofunctional alcohol or phenol from the carbonate molecule.

After the reaction, that is, without further modification, the highly branched, highly functional polycarbonates obtained according to the invention are terminated with hydroxyl groups and / or with carbonate groups. They dissolve well in different solvents, for example, in water, alcohols, such as methanol, ethanol, butanol, alcohol / water mixtures, acetone, 2-butanone, acetic ester, butyl acetate, methoxypropyl acetate, methoxyethyl acetate, tetrahydrofuran , dimethylformamide, dimethylacetamide, N-methylpyrrolidone, ethylene carbonate or propylene carbonate.

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High functionality polycarbonate is understood to mean, within the framework of this invention, a product which, in addition to the carbonate groups that form the polymeric structure, has at least three, preferably at least six, preferably, at the ends or sides, At least ten functional groups. In the case of the functional groups, they are preferably carbonate groups and / or OH groups. The amount of end or side functional groups in principle is not limited upwards, however, products with a large number of functional groups may have undesirable characteristics, for example, high viscosity or poor solubility. The high functionality polycarbonates of the present invention, for the most part, have no more than 500 terminal or side functional groups, preferably, no more than 100 terminal or side functional groups.

In order to obtain high functional polycarbonates B1) it is necessary that the ratio of the compounds containing OH groups with respect to the phosgene or carbonate be adjusted such that the resulting condensation product is simpler (hereinafter, the condensation product (K )) in the agent it contains either a carbonate or carbamoyl group and more than one OH group or an OH group and more than one carbonate or carbamoyl group. The simplest structure of the condensation product (K) from a carbonate (A) and a dialcohol or polyalcohol (B) in that case has the arrangement XYn or YnX, also, X represents a carbonate group, Y, a hydroxyl group and n, in general, a number between 1 and 6, preferably, between 1 and 4, particularly preferably, between 1 and 3. The resulting reactive group as an individual group, hereinafter generally referred to as "focus group".

If, for example, during the manufacture of the simplest condensation product (K) from a carbonate and a bivalent alcohol, the conversion ratio is 1: 1, an XY type molecule is obtained in the agent, described in the general formula 1.

image 1

In the manufacture of the condensation product (K) from a carbonate and a trivalent alcohol with a conversion ratio of 1: 1, a molecule of type XY2 is obtained in the agent, described in the general formula 2. The group focal is in this case a carbonate group.

image2

In the manufacture of the condensation product (K) from a carbonate and a tetravalent alcohol, also with the conversion ratio of 1: 1, a molecule of type XY3, described in the general formula 3, is obtained in the agent. The focus group is in this case a carbonate group.

image 1

In formulas 1 to 3, R has the meaning defined above and R1 represents an aliphatic or aromatic radical.

In addition, the manufacture of the condensation product (K) can also be carried out, for example, from a carbonate and a trivalent alcohol, described in the general formula 4, also, the conversion ratio in the molar case is 2: one. In this case, a molecule of type X2Y is obtained in the agent, the focus group is in this case an OH group. In formula 4, R and R1 have the same meaning as in formulas 1 to 3.

image 1

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If the components are additionally added difunctional compounds, for example, a dicarbonate or a diol, this causes a prolongation of the chains, as can be seen, for example, in the general formula 5. Again a molecule is obtained in the agent of type X2Y, the focus group is an OH group.

image3

In formula 5, R2 is an organic radical, preferably aliphatic, R and R1 are defined as described above.

Multiple condensation products (K) can also be used for synthesis. In this case, on the one hand, multiple alcohols or carbonates can be used. In addition, with the selection of the ratio of the alcohols and carbonates used or the mixtures of phosgens, different condensation products of different structure can be obtained. This is described with an example of conversion of a carbonate with a trivalent alcohol. If the initial products are arranged in a 1: 1 ratio, as represented in (II), an XY2 molecule is obtained. If the initial products are arranged in a 2: 1 ratio, as represented in (IV), an X2Y molecule is obtained. In the case of a ratio between 1: 1 and 2: 1, a mixture of XY2 and X2Y molecules is obtained.

The simple condensation products (K) described by way of example in formulas 1-5 react, according to the invention, preferably, intermolecularly, forming polycondensation products of high functionality, hereinafter referred to as polycondensation products (P ). The conversion to obtain the condensation product (K) and the polycondensation product (P) is usually carried out at a temperature of 0 to 250 ° C, preferably 60 to 160 ° C in substance or in solution. In turn, generally all solvents inert to the respective educts can be used. Preferably, organic solvents are used, for example, decane, dodecane, benzene, toluene, chlorobenzene, xylene, dimethylformamide, dimethylacetamide or solvent naphtha.

In a preferred embodiment, the condensation reaction is carried out in substance. The ROH monofunctional alcohol that is released during the reaction, or the phenol, can be distilled, if necessary, under reduced pressure, from the reaction equilibrium, to accelerate the reaction.

In the event that distillation extraction is planned, the use of carbonates that in the conversion release ROH alcohols with a boiling point below 140 ˚C is regularly recommended.

Catalysts or mixtures of catalysts can also be added for acceleration of the reaction. Suitable catalysts are catalyst compounds for esterification or transesterification reactions, for example, alkali hydroxides, alkali carbonates, alkali hydrogen carbonates, preferably sodium, potassium or cesium carbonates, tertiary amines, guanidines, ammonium compounds, phosphonium compounds, compounds organic aluminum, tin, zinc, titanium, zirconium or bismuth, in addition, the so-called double metal cyanide (DMC) catalysts, described, for example, in DE 10138216 or DE 10147712.

Preferably, potassium hydroxide, potassium carbonate, potassium hydrogen carbonate, octane diazabicyclo (DABCO), noneno diazabicyclo (DBN), diacebicyclo undecene (DBU), imidazoles, such as imidazole, 1-methylimidazole or 1,2-dimethylimidazole are used , titanium tetrabutylate, titanium tetraisopropylate, dibutyltin oxide, dibutyltin dilaurate, tin dioctoate, zirconium acetylacetonate or mixtures thereof.

The catalyst is added in general in an amount of 50 to 10,000, preferably 100 to 5000 ppm by weight in relation to the amount of the alcohol or alcohol mixture used.

Likewise, it is also possible to control the intermolecular polycondensation reaction both by adding a suitable catalyst as well as by selecting a suitable temperature. In addition, the average molecular weight of the polymer (P) can be regulated through the composition of the initial components and the residence time.

Condensation products (K) or polycondensation products (P) obtained at an elevated temperature are usually stable for a prolonged period of time at room temperature.

Due to the composition of the condensation products (K) it is possible that from the reaction of

Condensation is obtained condensation products (P) with different structures that have ramifications but no cross-links. Likewise, polycondensation products (P) have, in the ideal case, either a carbonate group as a focal group or more than two OH groups, or an OH group as a focal group and more than two carbonate groups. The amount of reactive groups follows, in turn, from the composition of the condensation products (K) used and the degree of polycondensation.

For example, a condensation product (K) according to general formula 2 can react by triple intermolecular condensation to form two different polycondensation products (P), represented in general formulas 6 and 7.

image 1

20 In formulas 6 and 7, R and R1 present the meaning defined above.

To interrupt the intermolecular polycondensation reaction there are different possibilities. For example, the temperature can be reduced to a range in which the reaction stops and the product (K) or polycondensation products (P) are stable storage.

In addition, the catalyst can be deactivated, in the case of basic ones, for example, by adding Lewis acids or protonic acids.

In another embodiment, as soon as a polycondensation product (P) with the desired polycondensation degree is present, due to the intermolecular reaction of the condensation product (K), it can be added to the product (P), for interruption of the reaction, a product with reactive groups before the focal group of (P). Thus, in the case of a carbonate group as the focus group, for example, a mono, di or polyamine can be added. In the case of a hydroxyl group as a focus group, the product (P) can be added, by

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For example, a mono, di or polyisocyanate, a compound containing epoxide groups or a derivative of acid reactive to OH groups.

The manufacture of high functionality polycarbonates according to the invention is generally carried out in a pressure range of 0.1 mbar to 20 bar, preferably, 1 mbar to 5 bar, in reactors or cascades of reactors operated in block operation, of Semi-continuous or continuous mode.

By means of the mentioned regulation of the reaction conditions and, possibly, by the selection of the suitable solvent, after its manufacture, the products according to the invention can be processed without further cleaning.

In another preferred embodiment, the product is stripper, that is, it is released from volatile compounds of low molecular weight. To do this, after reaching the desired degree of conversion, the catalyst can be optionally deactivated and volatile components of low molecular weight, for example, monoalcohols, phenols, carbonates, hydrogen chloride or volatile oligomers or cyclic compounds can be extracted by distillation , possibly, by introducing a gas, preferably nitrogen, carbon dioxide or air, if necessary, under reduced pressure.

In another preferred embodiment, the polycarbonates according to the invention, in addition to the functional groups already obtained by the reaction, contain other functional groups. The functionalization can, in turn, be carried out during the conformation of the molecular weight or also later, that is, after finishing the polycondensation itself.

If components are added before or during the molecular weight formation in addition to the hydroxyl groups

or carbonate contain other functional groups or functional elements, a polycarbonate polymer with static distribution functionalities of the carbonate or hydroxyl groups is obtained.

Such effects can be obtained, for example, by the addition of compounds during polycondensation which, in addition to hydroxyl groups, carbonate groups or carbamoyl groups carry other functional groups or functional elements, such as mercapto groups, primary, secondary or tertiary amino groups, groups ether, derivatives of carboxylic acids, derivatives of sulfonic acid, derivatives of phosphoric acid, silane groups, siloxane groups, aryl radicals or long chain aquyl radicals. For the modification by carbamate groups, for example, ethanolamine, propanolamine, isopropanolamine, 2- (butylamino) ethanol, 2- (cyclohexylamino) ethanol, 2-amino-1-butanol, 2- (2'-aminoethoxy) ethanol can be used or higher alkoxylation products of ammonia, 4-hydroxypiperidine, 1-hydroxyethylpiperazine, diethanolamine, dipropanolamine, diisopropanol-amine, tris (hydroxymethyl) aminomethane, tris (hydroxyethyl) amino-methane, ethylene diamine, propylenediamine or hexamethylamine.

For the modification with mercapto groups, for example, mercaptoethanol can be used. Tertiary amino groups can be generated, for example, by the incorporation of N-methyldiethanolamine, N-methyldipropanolamine or N, N-dimethylethanolamine. The ether groups can be generated, for example, by condensation of bifunctional or more functional polyetherols. Through the reaction with long chain alkanediols, long chain alkyl radicals can be incorporated, the reaction with alkyl or aryl diisocyanates generates polycarbonates having alkyl, aryl and urethane groups or urea groups.

Through the addition of dicarboxylic acids, tricarboxylic acids, for example, terephthalic acid dimethyl ester or tricarbonic acid ester, ester groups can be generated.

A subsequent functionalization can be obtained by converting the polycarbonate obtained, of high functionality, highly branched or hyperbranched, into an additional process step (step c)) by passing a suitable functionalization reagent, which can react with the OH and / or carbonate groups or groups polycarbonate carbamoyl.

Highly branched or hyperbranched, highly functional polycarbonates containing hydroxyl groups can be modified, for example, by adding molecules containing acidic groups or isocyanate groups. For example, polycarbonates containing acidic groups can be obtained by conversion with compounds containing anhydride groups.

In addition, high functionality polycarbonates containing hydroxyl groups can also be converted by conversion with alkylene oxides, for example, ethylene oxide, propylene oxide or butylene oxide, into high functionality polycarbonate polyether polyols.

A great advantage of the procedure is its economy. Both the conversion until obtaining a condensation product (K) or polycondensation product (P) as well as the reaction of (K) or (P) to obtain

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Polycarbonates with other groups or functional elements can be carried out in a reaction device, which is technically and economically advantageous.

As component B2), the moldable materials according to the invention may contain at least one hyperbranched polyester of the AxBy type, in which x is at least 1.1, preferably at least 1.3, especially when less, 2, and is at least 2.1, preferably at least 2.5, especially at least 3.

Naturally, mixtures such as A or B units can also be used.

A polyester of the AxBy type means a condensate consisting of a molecule A of functionality x and a molecule B of functionality y. We will mention, by way of example, a polyester of adipic acid as molecule A (x = 2) and glycerin as molecule B (y = 3).

By hyperbranched polycarbonate B2), within the framework of this invention are understood the macromolecules not cross-linked with hydroxyl and carboxyl groups that are not unitary either structurally or molecularly. On the one hand, they can be formed from a central molecule, analogously to dendrimers, but with unified chain length of branches. On the other hand, they can also be linearly shaped, with functional side groups, or as a combination of both ends, have linear and branched parts of the molecule. For the definition of dendrimer and hyperbranched polymers see also P.J. Flory, J. Am. Chem. Soc. 1952, 74, 2718 and H. Frey et al., Chem. Eur. J. 2000, 6, no 14, 2499.

By "hyperbranched" is understood, in relation to the present invention, that the degree of branching (degree of branching, DB), that is, the average amount of dendritic bonds plus the average number of terminal groups per molecule is 10 to 99.9 %, preferably, from 20 to 99%, especially preferably, from 20 -95%. By "dendrimer" it is understood, in relation to the present invention, that the degree of branching is 99.9-100%. For the definition of "degree of branching" see H. Frey et al., Acta Polym. 1997, 48, 30 and the formula mentioned in B1).

Preferably, component B2) has an Mn of 300 to 30,000, especially preferably, 400 to 25,000 and, especially, 500 to 20,000 g / mol, determined by GPC, Standard PMMA, eluent: dimethylacetamide.

Preferably, B2) has an OH number of 0 to 600, preferably 1 to 500, especially 20 to 500 mg KOH / g of polyester according to DIN 53240, as well as, preferably, a COOH index of 0 to 600, preferably, from 1 to 500 and, especially, from 2 to 500 mg of KOH / g of polyester.

The Tg is, especially, from -50 140C to 140 ˚C, preferably from -50 to 100 medianteC (by CDD, according to DIN 53765).

Especially preferred are those components B2) in which, at least one OH or COOH index is greater than 0, preferably, greater than 0.1 and, especially, greater than 0.5.

Component B2) can preferably be obtained according to the process according to the invention, described below, namely, converting

(to)

one or multiple dicarboxylic acids or one or multiple of its derivatives with one or multiple alcohols, at least, trifunctional or

(b)

one or multiple tricarboxylic acids or higher polycarboxylic acids or one or multiple of their derivatives with one or multiple diols in the presence of a solvent and, optionally, in the presence of a low molecular weight inorganic, metalorganic or organic catalyst or an enzyme. Conversion in the solvent is the preferred method of obtaining.

Highly functional polyesters, hyperbranched B2) within the meaning of the present invention are molecularly and structurally irregular. They differ in their molecular irregularity from dendrimers and therefore can be obtained at a significantly lower cost.

Among the convertible dicarboxylic acids according to variant (a) are, for example, oxalic acid, malonic acid, succinic acid, glutaric acid, adipinic acid, pimelic acid, subic acid, azelaic acid, sebacinic acid, undecan-α acid , ω-dicarboxylic acid, dodecan-α, ω-dicarboxylic acid, cis and trans-cyclohexane-1,2-carboxylic acid, cis-and trans-cyclohexane-1,3-dicarboxylic acid, cis-and trans-cyclohexan-1,4 -dicarboxylic, trans-cyclopentan-1,2-dicarboxylic cisy acid as well as cis and trans-cyclopentan-1,3-dicarboxylic acid, likewise, the aforementioned dicarboxylic acids may be substituted with one or multiple radicals, selected from the alkyl groups C1-C10, for example, methyl, ethyl, n-propyl, iso-propyl, n-butyl, isobutyl, sec.-butyl, tert.-butyl, n

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pentyl, iso-pentyl, sec.-pentyl, neo-pentyl, 1,2-dimethylpropyl, iso-amyl, n-hexyl, iso-hexyl, sec.-hexyl, n-heptyl, iso-heptyl, n-octyl, 2-ethylhexyl, n-nonyl or n-decyl, C3-C12 cycloalkyl groups, for example, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, cycloundecyl and cyclododecyl; cyclopentyl, cyclohexyl and cycloheptyl are preferred; alkylene groups such as methylene or ethylidene or C6-C14 aryl groups, for example, phenyl, 1-naphthyl, 2-naphthyl, 1-antryl, 2-antryl, 9-antryl, 1-phenanthryl, 2-phenanthryl, 3-phenanthryl, 4-phenanthryl and 9-phenanthryl, preferably phenyl, 1-naphthyl and 2-naphthyl, particularly preferably, phenyl.

We will mention by way of example the following representatives of substituted dicarboxylic acids: 2-methylmalonic acid, 2-ethylmalonic acid, 2-phenylmalonic acid, 2-methyl succinic acid, 2-ethyl succinic acid, 2-phenylsuccinic acid, itaconic acid, 3,3-dimethylglutaric acid.

In addition, they also belong to dicarboxylic acids that can be converted according to variant (a) ethylenically unsaturated acids, for example, maleic acid and fumaric acid as well as aromatic dicarboxylic acids such as phthalic acid, isophthalic acid or terephthalic acid.

In addition, mixtures of two or multiple of the aforementioned representatives may be used.

The dicarboxylic acids can be used, either as such, or in the form of derivatives.

They are understood as derivatives, preferably

-the corresponding anhydrides in monomeric or polymeric form,

-mono or dialkyl esters, preferably mono or dimethyl esters or the corresponding mono or diethyl esters, but also mono and dialkyl esters derived from higher alcohols, for example, from n-propanol, iso-propanol, nbutanol, isobutanol, tert-butanol, n -pentanol, n-hexanol,

-Also, mono and divinyl esters as well as

-mixed esters, preferably, methyl ethyl esters.

In the context of the preferred preparation it is also possible to use a mixture of a dicarboxylic acid and one or multiple derivatives. It is also possible to use a mixture of one or multiple different derivatives of one or multiple dicarboxylic acids.

Especially preferred is succinic acid, glutaric acid, adipinic acid, phthalic acid, isophthalic acid, terephthalic acid or its mono or dimethyl esters. Especially preferred is adipic acid.

At least trifunctional alcohols can be converted, for example: glycerin, butane-1,2,4-triol, n-pentane 1,2,5-triol, n-pentane-1,3,5-triol, n- hexane-1,2,6-triol, n-hexane-1,2,5-triol, n-hexane-1,3,6-triol, trimethylolbutane, trimethylolpropane or di-trimethylolpropane, trimethylolethane, pentaerythrite or dipentaerythrite; sugar alcohols, for example, mesoerythritol, treitol, sorbitol, handyman or mixtures of at least trifunctional alcohols. Preferably, glycerin, trimethylolpropane, trimethylolethane and pentaerythritol are used.

The tricarboxylic or polycarboxylic acids that can be converted according to variant (b) are, for example, 1,2,4-benzenetricarboxylic acid, 1,3,5-benzenetricarboxylic acid, 1,2,4,5-benzenetetracarboxylic acid as well as melitic acid

In the reaction according to the invention, tricarboxylic or polycarboxylic acids can be used, either as such, or also in the form of derivatives.

They are understood as derivatives, preferably

-the corresponding anhydrides in monomeric or polymeric form,

-mono, di or trialkyl esters, preferably mono, di or trimethyl esters or the corresponding mono, di or triethyl esters, but also mono, di and trialkyl esters derived from higher alcohols, for example, from npropanol, iso-propanol, n-butanol, isobutanol, tert-butanol, n-pentanol, n-hexanol, in addition, mono, di or trivilinesters

-as well as mixed methylethyl esters.

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In the context of the present invention, it is also possible to use a mixture of a tri or polycarboxylic acid and one or more of its derivatives. In the context of the present invention it is also possible to use a mixture of one

or multiple different derivatives of one or multiple tri or polycarboxylic acids to obtain component B2).

As diols for variant (b) of the present invention, for example ethylene glycol, propane-1,2-diol, propane-1,3-diol, butane-1,2-diol, butane-1,3-diol are used , butane-1,4-diol, butane-2,3-diol, pentane-1,2-diol, pentane-1,3diol, pentane-1,4-diol, pentane-1,5-diol, pentane-2 , 3-diol, pentane-2,4-diol, hexane-1,2-diol, hexane-1,3-diol, hexane1,4-diol, hexane-1,5-diol, hexane-1,6- diol, hexane-2,5-diol, heptane-1,2-diol 1,7-heptanediol, 1,8-octandiol, 1,2octandiol, 1,9-nonandiol, 1,10-decanediol, 1,2-decanediol , 1,12-dodecandiol, 1,2-dodecandiol, 1,5-hexadien-3,4-diol, cyclopentandiols, cyclohexandiols, inositol and derivatives, (2) -methyl-2,4-pentandiol, 2,4-dimethyl -2,4-pentandiol, 2-ethyl1,3-hexandiol, 2,5-dimethyl-2,5-hexandiol, 2,2,4-trimethyl-1,3-pentandiol, pinacol, diethylene glycol, triethylene glycol, dipropylene glycol, tripropylene glycol , polyethylene glycols HO (CH2CH2O) nH or polypropylene glycols HO (CH [CH3] CH2O) nH or mixtures of two or more representatives of the above compounds, where e n is an integer and n = 4 to 25. In turn, in the diols mentioned, one or both hydroxyl groups can also be substituted by SH groups. Ethylene glycol, propane-1,2-diol as well as diethylene glycol, triethylene glycol, dipropylene glycol and tripropylene glycol are preferred.

The molar ratio of the A molecule with respect to the B molecules in the Ax By polyester in variants (a) and (b) is 4: 1 to 1: 4 and, especially, 2: 1 to 1: 2.

The alcohols, at least, trifunctional converted according to the variant (a) of the process may have hydroxyl groups of, respectively, the same reactivity. Also in this case, at least trifunctional alcohols are preferred, whose OH groups first have the same reactivity, but in which, thanks to the reaction with at least one acidic group, a drop in reactivity can be induced, conditioned by steric or electronic influences, in the other OH groups. This is the case, for example, when using trimethylolpropane or pentaerythritol.

But, at least, trifunctional alcohols converted according to variant (a) can also have hydroxyl groups with at least two chemically different reactivities.

The different reactivity of the functional groups may, in turn, be based on chemical causes (for example, primary / secondary / tertiary OH group) or steric causes.

For example, in the case of triol it may be a triol having primary and secondary hydroxyl groups, for example, glycerin is preferred.

In the case of the conversion according to the invention according to the variant (a), it is preferably worked in the absence of diols and monofunctional alcohols.

In the case of carrying out the conversion according to the invention according to the variant (b), work is preferably carried out in the absence of mono and dicarboxylic acids.

The process according to the invention is carried out in the presence of a solvent. Suitable, for example, are hydrocarbons such as paraffins or aromatic substances. Especially suitable paraffins are nheptane and cyclohexane. Especially suitable aromatic substances are toluene, ortho-xylene, meta-xylene, para-xylene, xylene as an isomeric mixture, ethylbenzene, chlorobenzene and ortho and meta-dichlorobenzene. In addition, solvents in the absence of acid catalysts are especially suitable: ethers, for example, dioxane or tetrahydrofuran and ketones, for example, methyl ethyl ketone and methyl isobutyl ketone.

The amount of solvent added is, according to the invention, of at least 0.1% by weight, based on the mass of the initial materials used, preferably at least 1% by weight and, especially preferably At least 10% by weight. Surplus surpluses can also be used, in relation to the mass of initial material to be converted, for example, from 1.01 to 10 times. The amounts of solvent more than 100 times, in relation to the mass of initial material to be converted, are not advantageous, because with a remarkably lower concentration of the reagents the reaction rate is markedly reduced, which causes a conversion time of A long non-economic.

To carry out the preferred process according to the invention, it is possible to work in the presence of a medium that extracts water as an additive, which is added at the beginning of the reaction. For example, molecular sieves, especially 4Å molecular sieve, MgSO4 and Na2SO4, are suitable. During the reaction while you can also add another medium that extracts water or replace the medium that extracts water with a new one that extracts water. You can also distill the water or alcohol obtained during the reaction and use, for example, a water separator.

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The procedure can be performed in the absence of acid catalysts. Preferably, one works in the presence of an inorganic, metalorganic or organic acid catalyst or mixtures of multiple inorganic, metalorganic or organic acid catalysts.

As inorganic catalyst within the meaning of the present invention we can mention, for example, sulfuric acid, phosphoric acid, phosphonic acid, hypophosphorous acid, aluminum sulfate hydrate, alum, acid silica gel (pH = 6, especially = 5) and acid aluminum oxide. In addition, for example, aluminum compounds of the general formula Al (OR) 3 and titanates of the general formula Ti (OR) 4 can be used as inorganic acid catalysts, likewise, the radicals R can be the same or different and are selected , independently of one another, between C1-C10-alkyl radicals, for example methyl, ethyl, n-propyl, iso-propyl, n-butyl, isobutyl, sec.-butyl, tert-butyl, n-pentyl, iso-pentyl, sec .-pentyl, neo-pentyl, 1,2-dimethylpropyl, iso-amyl, n-hexyl, iso-hexyl, sec.-hexyl, nheptyl, iso-heptyl, n-octyl, 2-ethylhexyl, n-nonyl or n -decyl, C3-C12 cycloalkyl radicals, for example, for example, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, cycloundecyl and cyclododecyl; cyclopentyl, cyclohexyl and cycloheptyl are preferred. R radicals in Al (OR) 3 o are preferred. Ti (OR) 4 respectively equal and selected from isopropyl or 2-ethylhexyl.

Preferred metal acid catalysts are selected, for example, from R2SnO dialkyltin oxides, also, R is defined as above. An especially preferred representative of metal acid catalysts is di-n-butyltin oxide, which can be purchased commercially as the so-called oxo-tin, or di-n-butyltin dilaurate.

Preferred organic acid catalysts are organic compounds with, for example, phosphate groups, sulfonic acid groups, sulfate groups or phosphonic acid groups. Especially preferred are sulfonic acids, for example, para-toluenesulfonic acid. Ion exchangers can also be used as organic acid catalysts, for example, polystyrene resins containing sulfonic acid groups, crosslinked with approximately 2% mol of divinylbenzene.

Combinations of two or multiple of the mentioned catalysts can also be used. It is also possible to use those organic or metalorganic or also inorganic catalysts present in the form of discrete molecules, in immobilized form.

If it is desired to use inorganic, metalorganic or organic acid catalysts, according to the invention, 0.1 to 10% by weight, preferably 0.2 to 2% by weight of catalysts are used.

The process according to the invention is carried out in an atmosphere of inert gas, that is, for example, under carbon dioxide, nitrogen or a noble gas, among which we can especially mention argon.

The process according to the invention is carried out at temperatures of 60 to 200 ° C. Preferably, it works at temperatures from 130 to 180, especially up to 150 ° C or below. Especially preferred, the maximum temperatures are up to 145 ° C, especially preferably, up to 135 ° C.

The conditions of the process according to the invention, in themselves, are not critical. You can work with a noticeably reduced pressure, for example, at 10 to 500 mbar. The process according to the invention can also be carried out at pressures above 500 mbar. Conversion to atmospheric pressure is preferred, for simplicity's sake; but an embodiment with a slightly elevated pressure is also possible, for example, at 1200 mbar. It is also possible to work with a remarkably high pressure, for example, at pressures up to 10 bar. Conversion to atmospheric pressure is preferred.

The duration of the conversion of the process according to the invention is usually 10 minutes to 25 hours, preferably 30 minutes to 10 hours, and especially preferably one to 8 hours.

After completion of the reaction, highly functional hyperbranched polyesters can be easily isolated, for example, by filtration of the catalyst and concentration, also, the concentration is usually carried out at a reduced pressure. Other suitable processing methods are precipitation after the addition of water and subsequent washing and drying.

In addition, component B2) can be obtained in the presence of enzymes or enzyme decomposition products (according to DE-A 101 63163). The converted dicarboxylic acids according to the invention do not belong to the organic acid catalysts within the meaning of the present invention.

The use of lipases or esterases is preferred. Suitable lipases and esterases are candida cylindracea, candida lipolytica, candida rugosa, candida antarctica, candida utilis, chromobacterium viscosum, geolrichum viscosum, geotrichum candidum, mucor javanicus, mucor mihei, pig pancreas, pseudomonas spp. arrhizus, rhizopus delemar, rhizopus niveus, rhizopus oryzae,

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aspergillus niger, penicillium roquefortii, penicillium camembertii or esterases of bacillus spp. und bacillus thermoglucosidasius. Candida Antarctica lipase B is especially preferred. The presented enzymes can be purchased commercially, for example, from Novozymes Biotech Inc., Denmark.

Preferably, the enzyme is used in immobilized form, for example, in silica gel or Lewatit®. The procedures for the immobilization of enzymes are themselves known, for example, by Kurt Faber, "Biotransformations in organic chemistry", 3rd edition, 1997, Springer Publishing, chapter 3.2 "Immobilization" pages 345 -356. Immobilized enzymes can be purchased commercially, for example, from Novozymes Biotech Inc., Denmark.

The amount of the immobilized enzyme used is 0.1 to 20% by weight, especially 10 to 15% by weight, in relation to the mass of the initial materials used to convert.

The process according to the invention is carried out at temperatures above 60 ˚C. Preferably, it works at temperatures of 100 ° C or below. Temperatures of up to 80 ˚C are preferred, especially preferably, from 62 to 75 yC and even more so, from 65 to 75 ˚C.

The process according to the invention is carried out in the presence of a solvent. Suitable, for example, are hydrocarbons such as paraffins or aromatic substances. Especially suitable paraffins are nheptane and cyclohexane. Especially suitable aromatic substances are toluene, ortho-xylene, meta-xylene, para-xylene, xylene as an isomeric mixture, ethylbenzene, chlorobenzene and ortho and meta-dichlorobenzene. In addition, especially suitable are: ethers, for example, dioxane or tetrahydrofuran and ketones, for example, methyl ethyl ketone and methyl isobutyl ketone.

The amount of solvent added is at least 5 parts by weight, based on the mass of the starting materials used to convert, preferably, at least 50 parts by weight and, especially preferably, at least 100 parts into weight. Quantities of more than 10,000 parts by weight of solvent are not desired, because in the case of remarkably lower concentrations the reaction rate drops markedly, which causes a non-economical length of conversion.

The process according to the invention is carried out at pressures above 500 mbar. Conversion to atmospheric or slightly elevated pressure is preferred, for example, at 1200 mbar. It is also possible to work with a remarkably high pressure, for example, at pressures up to 10 bar. Conversion to atmospheric pressure is preferred.

The duration of the conversion of the process according to the invention is usually 4 minutes to 6 hours, preferably, 5 minutes to 5 hours and, especially preferably, 8 hours to 4 days.

After completion of the reaction, highly functional hyperbranched polyesters can be easily isolated, for example, by filtration of the enzyme and concentration, also, the concentration is usually carried out at a reduced pressure. Other suitable processing methods are precipitation after the addition of water and subsequent washing and drying.

The hyperbranched high functionality polyesters obtained according to the process according to the invention are characterized by very low proportions of discoloration and resinification. For the definition of hyperbranched polymers, see also: P.J. Flory, J. Am. Chem. Soc. 1952, 74, 2718 and A. Sunder et al., Chem. Eur. J. 2000, 6, No.1, 1-8. However, by "high functionality hyperbranching" it is understood in the context of the present invention that the degree of branching, ie the average amount of dendritic bonds plus the average number of terminal groups per molecule is 10 -99.9%, preferably 20 -99%, particularly preferably, 30 -90% (see for this, H. Frey et al. Acta Polym. 1997, 48, 30).

Polyesters according to the invention have a molecular weight Mw of 500 to 50,000 g / mol, preferably 1000 to 20,000, particularly preferably 1000 to 19,000. The polydispersity is 1.2 to 50, preferably , 1.4 to 40, preferably 1.5 to 30 and especially 1.5 to 10. They usually have a good solubility, that is, clear solutions with up to 50% by weight can be represented in some cases, even up to 80% by weight of the polyester according to the invention in tetrahydrofuran (THF), n-butylacetate, ethanol and numerous other solvents, without detecting gel particles with the naked eye.

The highly functional, hyperbranched polyesters according to the invention have a carboxy termination, a carboxy group and hydroxyl group termination and, preferably, a hydroxyl group termination.

The ratios between components B1) and B2) are preferably 1: 20 to 20: 1, especially 1: 15 a

15: 1, and especially 1: 5 to 5: 1, if used in a mixture.

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In the case of hyperbranched polycarbonates B1) / polyesters B2) these are nanoparticles. The particle size in the compound is 20 to 500 nm, preferably 50-300 nm. Such compounds can be obtained commercially as Ultradur ® high speed.

As filler material C) of fibers or in the form of particles, carbon fibers, glass fibers, glass spheres, amorphous silicic acid, asbestos, calcium silicate, calcium metasilicate, magnesium carbonate, kaolin, chalk, are mentioned. pulverized quartz, mica, barium sulfate and feldspar, which are used in amounts of 10 to 60, especially 30 to 60 and, especially preferably, 40 to 55% by weight.

As the preferred filler material, in the form of fiber, we mention carbon fibers, aramid fibers and potassium titanate fibers, likewise, glass type E glass fibers are especially preferred. These can be implemented as rovings or cutting glass in the usual ways in the market.

Especially preferred are fiberglass mixtures C) with component B) in a ratio of 1: 100 to 1: 2, and preferably 1: 10 to 1: 3.

The fibrous filler material can be pretreated superficially with a silane compound, for better compatibility with thermoplastics.

Examples of silane compounds are those of the general formula

(X- (CH2) n) k-Si- (O-CmH2m + 1) 4-k

in which the substituents have the following meaning:

X NH2-,

image 1

HO-, n is an integer from 2 to 10, preferably, 3 to 4 m is an integer from 1 to 5, preferably, 1 to 2 k is an integer from 1 to 3, preferably, 1 The silane compounds Preferred are aminopropyltrimethoxysilane, aminobutyltrimethoxysilane,

aminopropyltriethoxysilane, aminobutyltriethoxysilane and the corresponding silanes containing, as substituent x,

a glycidyl group. The silane compounds are generally used in amounts of 0.05 to 5, preferably 0.5 to 1.5, and of especially preferred, from 0.8 to 1% by weight (with respect to D) for the surface coating.

Also suitable are mineral fillers, needle-shaped. In the sense of the invention, we understand by needle-shaped mineral filler material, a filler material mineral with a very marked needle shape. As an example, we mentioned wollastonite in the form of a needle. The mineral preferably has a length-diameter ratio (L / D) of 8: 1 to 35: 1, preferably 8

: 1 to 11: 1. The mineral filler material can eventually be pretreated with the silane compound previously mentioned; But pretreatment is not a necessary requirement. As another filling material we will mention the kaolin, calcined kaolin, wollastonite, talc and chalk. As component D) the moldable materials according to the invention may contain 0 to 20, especially up to

15% by weight of other additional substances and auxiliary means for processing. As component D), the moldable materials according to the invention may contain 0 to 5, preferably, 0.05 to 3 and especially preferably 0.1 to 2% by weight of at least one ester or acid amide

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saturated or unsaturated carboxylic aliphatic with 10 to 40, preferably 16 to 22 C atoms with alcohols, or amines, aliphatic saturated with 2 to 40, preferably 2 to 6 C atoms.

The carboxylic acids can have a valence of 1 or 2. For example, we will mention pelargonic acid, palmitic acid, lauryl acid, margaric acid, dodecanedioic acid, behenic acid and, especially preferably, stearic acid , caprinic acid, as well as montanic acid (mixture of fatty acids with 30 to 40 C atoms).

Aliphatic alcohols may have a valence of 1 to 4. Examples of alcohols are n-butanol, n-octanol, stearyl alcohol, ethylene glycol, propylene glycol, neopentyl glycol, pentaerythrite, also glycerin and pentaerythrite are preferred.

Aliphatic amines may have a valence of 1 to 3. Examples of this are stearylamine, ethylenediamine, propylenediamine, hexamethylenediamine, di (6-aminohexyl) amine, and ethylenediamine and hexamethylenediamine are also preferred. Preferred esters or amides are, correspondingly, glycerin distearate, glycerin tristearate, ethylenediamine stearate, glycerin monopalmitrate, glycerin trilaurate, glycerin monobehenate and pentaerythrite stearate.

It is also possible to implement mixtures of different esters or amides, or esters with amides in combination, with a free mixing ratio.

Other usual additional substances C) are, for example, in amounts of 40, preferably up to 30% by weight of polymerization products with rubber elasticity (also often referred to as shock resistance modifiers, elastomers or rubbers).

In general, they are copolymerized which, preferably, are constituted from at least two of the following monomers: ethylene, propylene, butadiene, isobutene, isoprene, chloroprene, vinyl acetate, styrene, acrylonitrile and acrylic acid ester or methacrylic with 1 to 18 C atoms in the alcohol component.

Such polymers are described, for example, in Houben-Weyl, Methoden der Organischen Chemie (Organic Chemistry Methods), volume 14/1 (Georg-Thieme Publishing House, Stuttgart, 1961). pages 392 to 406, and in the monograph of

C.B. Bucknall, "Toughened Plastics" (Applied Science Publishers, London, 1977).

Next, some preferred types of said elastomers will be presented.

Preferred types of such elastomers are so-called ethylene-propylene rubbers (EPM) or ethylene-propylene-diene rubbers (EPDM).

EPM rubbers in general no longer have double bonds, while EPDM rubbers may have 1 to 20 double bonds / 100 C atoms. As diene-monomers for EPDM rubbers we will mention, for example, conjugated dienes, such as isoprene and butadiene, dienes not conjugated with 5 to 25 C atoms, such as penta-1,4-diene, hexa-1,4-diene, hexa-1,5-diene, 2,5-dimethylhexa-1,5-diene and octa- 1,4-diene, cyclic dienes such as cyclopentadiene, cyclohexadiene, cyclooctadiene and dicyclopentadiene, as well as alkenyl norbornenes, such as 5-ethylidene-2-norbornene, 5-butylidene-2-norbornene, 2-metalyl-5-norbornene; 2-Isopropenyl-5-norbornene and tricyclodiene such as 3-methyltricycle (5.2.1.0.2.6) -3,8-decadiene or mixtures thereof. Hexa-1,5-diene, 5ethylideneborbornene and dicyclopentadiene are preferred. The diene content of the EPDM rubbers is preferably 0.5 to 50, particularly preferably, 1 to 8% by weight, based on the total weight of the rubber.

EPM or EPDM rubbers may have grafts, preferably also with reactive carboxylic acids or their derivatives. We will mention here, for example, acrylic acid, methacrylic acid and its derivatives, for example, glycidyl (meth) acrylate, as well as maleic acid anhydride.

Another group of preferred rubbers are copolymers of ethylene with acrylic acid and / or methacrylic acid and / or esters of said acids. Additionally, the rubbers may also contain dicarboxylic acids, such as maleic acid and fumaric acid, or derivatives of these acids, for example, ester and anhydrides and / or epoxy groups containing monomers. These derivatives of dicarboxylic acids or epoxy groups containing monomers are preferably incorporated by adding dicarboxylic or epoxy groups containing monomers of the general formula I or II or III or IV, to the mixture of monomers in the rubber

R1C (COOR2) = C (COOR3) R4 (I)

image 1

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wherein R1 to R9 represent hydrogen or alkyl groups with 1 to 6 C atoms and m is an integer from 0 to 20, g an integer from 0 to 10 and p an integer from 0 to 5

R9

The radicals R 1 a preferably represent hydrogen, also, m represents 0 or 1, and g, 1. The corresponding compounds are maleic acid, fumaric acid, maleic acid anhydride, allyl glycidyl ether and vinyl glycidyl ether.

Preferred compounds of formulas I, II and IV are maleic acid, maleic anhydride and esters containing epoxy, acrylic acid and / or methacrylic acid groups, such as glycidyl acrylate, glycidyl methacrylate and esters with tertiary alcohols, such as t-butylacrylate . Although the latter do not have free carboxy groups, in their behavior they approach free acids and are therefore called monomers with latent carboxy groups.

Advantageously, the copolymers consist of 50 to 98% by weight of ethylene, 0.1 to 20% by weight of epoxy groups containing monomers and / or methacrylic acid and / or acid anhydride groups containing monomers, as well as remaining amounts of esters of (meth) acrylic acid.

Especially preferred are copolymers of

50 to 98, especially 55 to 95% by weight of ethylene,

0.1 to 40, especially 0.1 to 20% by weight of glycidyl acrylate,

and / or glycidyl methacrylate, (meth) acrylic acid and / or maleic acid anhydride, and

1 to 45, especially 10 to 40% by weight of n-butylacrylate and / or 2-ethylhexylacrylate.

Other preferred esters of acrylic and / or methacrylic acid are methyl, ethyl, propyl and i-or t-butyl esters.

In addition, vinyl esters and vinyl ethers can be used as comonomers.

The ethylene copolymers described above can be obtained according to known procedures, preferably by statistical copolymerization under elevated pressure and temperature. The corresponding procedures are known.

Preferred elastomers are also emulsion polymerization products, the preparation of which is described, for example, in the Blackley monograph "Emulsion Polymerization". Applicable emulsifiers and catalysts are known.

In principle, homogeneously constituted elastomers can be used but also those with a stratum structure. Stratum construction is determined by the order of addition of each individual monomer; also the morphology of the polymers is influenced by this order of addition.

We will mention, only as an example for the elaboration of the rubber part of the elastomers, the actrilates such as, for example, n-butylacrylate and 2-ethylhexylacrylate, corresponding methacrylates, butadiene and isoprenes as well as their mixtures. These monomers can be copolymerized with other monomers such as, for example, styrene, acrylonitrile, vinyl ethers and other acrylates or methacrylates such as methyl methacrylate, methylacrylate, ethylacrylate and propylacrylate.

The soft or rubber phase (with a glass transition temperature below 0 ° C) of the elastomers can be the core, the outer shell or an intermediate cover (in the case of elastomers with a construction of more than 5 two shells ); In the case of multi-wrap elastomers, several layers may consist of a rubber phase.

If, in addition to the rubber phase, one or more more rigid components (with glass transition temperatures greater than 20 ° C) integrate the construction of the elastomer, these are obtained, in general, by polymerization of styrene, acrylonitrile, methacrylonitrile, α -methylstyrene, p-methylstyrene, acrylic acid esters and acid esters

10 methacrylics such as methyl acrylate, ethyl acrylate and methyl methacrylate as main monomers. In addition, small amounts of other comonomers can be used.

In some cases the use of emulsion polymerization products having surface reactive groups was advantageous. Such groups are, for example, epoxy, carboxyl, latent carboxyl, amino or amide groups, as well as functional groups that can be introduced by joint application of monomers of the formula

15 general

image 1

where substituents can have the following meanings:

R10 hydrogen or a C1 to C4 alkyl group,

R11 hydrogen, a C1 to C8 alkyl group or an aryl group, especially phenyl, R12 hydrogen, a C1 to C10 alkyl group, a C6 to C12 or OR13 aryl group

R13 is a C1 to C8 alkyl group or a C6 to C12 aryl group, which may eventually be substituted with groups containing O or N, X a chemical bond, a C1 to C10 alkylene group or a C6 to C12 arylene group or

image 1

25 Y O-Z or NH-Z and

Z is a C1 to C10 alkylene group, or a C6 to C12 arylene group.

Also the monomer grafts described in EP-A 208 187 are suitable for the introduction of reactive groups on the surface.

As another example we will also mention acrylamide, methacrylamide and substituted esters of acrylic acid or methacrylic acid such as (N-butylamino) -ethyl methacrylate, (N, N-dimethylamino) ethylacrylate, (N, N-dimethylamino) -methylacrylate and (N, N-diethylamino) ethylacrylate.

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In addition, the rubber phase particles can also be crosslinked. As monomers of cross-linked effect we will mention, for example, buta-1,3-diene, divinylbenzene, diallyl phthalate and dihydrodicyclopentadienyl acrylate, as well as the compounds described in EP-A 50 265.

In addition, so-called graft-linking monomers can be used, that is, monomers with two or more polymerizable double bonds that react at different rates during polymerization. Preferably, the compounds in which at least one reactive group polymerizes with approximately the same rate as the other monomers are used, while the other reactive group (or reactive groups) polymerizes or polymerizes noticeably slower. The different polymerization rates result in a proportion of unsaturated double bonds in the rubber. If another phase is grafted onto this rubber later, the double bonds present in the rubber react, at least partially, with the monomer graft, forming chemical bonds, that is, the grafted phase is linked, at least partially, through bonds chemicals, at the base of the graft.

Examples of such graft crosslinked monomers are monomers containing allyl groups, especially, allyl esters of ethylenically unsaturated carboxylic acids such as allylacrylate, allyl methacrylate, diallylmaleate, diallyl fumarate, diallylconate or the corresponding monoalyl bonds of these dicarboxylic acids. In addition, there is a large number of other suitable graft crosslinked monomers; For more details, it refers, for example, to US-PS 4 148 846.

In general, the proportion of these cross-linked monomers in the high impact modified polymer is up to 5% by weight, preferably not more than 3% by weight in relation to the high impact modified polymer.

Below are some preferred emulsion polymerization products. First of all, mention should be made of graft polymerization products with a core with at least one outer shell, with the following construction:

kind

Core monomer Wrap monomer

I

Buta-1,3-diene, isoprene, n-butylacrylate, ethylhexylacrylate or mixtures thereof styrene, acrylonitrile, methyl methacrylate

II

As in I but also using crosslinkers As in I

III

As in I or II n-butylacrylate, ethyl acrylate, methyl acrylate, buta-1,3-diene, isoprene, ethylhecrylate

IV

As in I or II As in I or III but also using monomers with reactive groups, as described in this case

V

Styrene, acrylonitrile, methylmethacrylate or mixtures thereof First monomer wrap as described in I and II for the core second wrap as described in I and IV for the wrap

These polymerization products, especially ABS and / or ASA polymers, in amounts of up to 40% by weight, are preferably used for high impact modification of PBT, optionally, in mixtures with up to 40% by weight of polyethylene terephthalate. The corresponding mixing products can be purchased under the trade name Ultradur®S (formerly Ultrablend®S from BASF AG).

Instead of graft polymerization products with a multiple shell construction, homogeneous elastomers, i.e., one layer, buta-1,3-diene, isoprene and n-butylacrylate or their copolymers, can also be used. These products can also be made by joint application of cross-linked monomers or monomers with reactive groups.

Examples for emulsion polymerization products are n-butylacrylate / (copolymers of (meth) acrylic acid, n-butylacrylate / glycidyl acrylate or n-butylacrylate / glocidyl methacrylate copolymers, graft polymerization products with an internal core of n-butylacrylate or base to butadiene and an outer shell of the aforementioned copolymers and copolymers of ethylenes with comonomers that produce reactive groups.

The elastomers described can also be made according to other usual methods, for example, by suspension polymerization.

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Silicone rubbers are also preferred, such as those described in memories DE-A 37 25 576, EP-A 235 690, DE-A 38 00 603 and EP-A 319 290.

Naturally, mixtures of the types of rubber presented can also be used.

As component D), the thermoplastic moldable materials according to the invention may contain auxiliary processing elements, such as stabilizers, oxidation retarders, means against heat dissolution and decomposition by ultraviolet light, sliding and demolding agents, dyeing agents such as dyes and pigments , crystalline germ forming agents, softeners, etc.

As an example of oxidation retarders and heat stabilizers we will mention phenols with steric hindrance and / or phosphites, hydroquinones, secondary aromatic amines such as diphenylamines, different substituted representatives of these groups and their mixtures in concentrations of up to 1% by weight, in relation to weight of thermoplastic moldable materials.

As UV stabilizers, used, in general, in amounts of up to 2% by weight in relation to the moldable matter, we will mention different resorcins, salicylates, benzotriazoles and substituted benzophenones.

Inorganic pigments such as titanium oxide, ultramarine blue, iron oxide and carbon black, as well as organic pigments such as phthalocyanine, quinacridone, perylene, as well as dyes such as anthraquinone nigrosine, can be added as dyeing agents.

As crystalline germ forming agents, aluminum oxide, silicon dioxide and, preferably, talc can be used.

Other sliding and release agents are generally used in amounts of up to 1% by weight. Long chain fatty acids (for example, stearic acid or behenic acid), their salts (for example, Ca or Zn stearate) or montane waxes (mixtures of unsaturated straight chain carboxylic acids, with chain lengths of 28 to 32 C atoms) as well as Ca or Na montanate, as well as low molecular weight polyethylene or polypropylene waxes.

As an example of softeners we will mention dioctyl ester of phthalic acid, dibenzyl ester of phthalic acid, butylbenzyl ester of phthalic acid, hydrocarbon oils, N- (n-butyl) benzenesulfonamide.

The moldable materials according to the invention can still contain 0 to 2% by weight of fluorine-containing ethylene polymerization products. In this case, it deals with polymerization products of ethylene with a fluorine content of 55 to 76% by weight, preferably 70 to 76% by weight.

Examples are polytetrafluoroethylene (PTFE), tetrafluoroethylenehexafluorpropylene copolymer or tetrafluoroethylene copolymerization products with reduced amounts (generally up to 50% by weight) of polymerizable, ethylenically unsaturated monomers. These are described, for example, by Schildknecht in "Vinyl and Related Polymers", Editorial Wiley, 1952, pages 484-494, and by Wall in "Fluorpolymers" (fluoropolymers) (Wiley Interscience, 1972).

These fluorine-containing ethylene polymerization products are homogeneously distributed in the moldable matter and preferably have a particle size d50 (average value) in the area of 0.05 to 10 m, especially 0.1 to 5 mm. These reduced particle sizes can be obtained especially preferably using aqueous dispersions of fluorine-containing ethylene polymerization products, and achieve their incorporation into a polyester melt.

The thermoplastic moldable materials according to the invention can be obtained according to known processes in which the initial components are mixed in usual mixing devices such as screw screw extruders, Brabender mills or Banbury mills and then extruded. After extrusion, the extrusion product can be refrigerated and crushed. You can also pre-mix individual components and then add the rest of the starting materials, one by one and / or also mixed. Mixing temperatures are generally between 230 and 290 ° C.

In a preferred variant of the pre-mix of the components, the granules are previously mixed together

or PET chips in, for example, an asymmetric motion mixer and subsequently processed, by means of a so-called gas pressure process and / or a water injection process. Gas or water injection processes can be used individually as well as in combination. Gas or water injection processes are called fluid injection procedures and have the following general procedural characteristics:

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If the thermoplastic melt is in the blow mold, a separate tubular part (injector with feed) N2 / compressed air with 40 to 50 bar at room temperature is introduced. When the gas valve is opened, the mold is injected in water at almost the same time, at a distance of approximately 2 seconds (60 to 70 bar at room temperature).

The gas is then compressed and the melt is pressed against the outer walls of the mold. Water remains 3 to 5 seconds in the mold. Then a pressure reduction is carried out until the tool can be opened.

According to another preferred mode of work, components B) and C) and, possibly D), can be mixed, made and granulated with a prepolymer. Then, in a solid phase under inert gas, the granulate obtained is condensed continuously or discontinuously at a temperature below the melting point of component A) until the desired viscosity is reached.

PET thermoplastic moldable materials according to the invention or PET mixtures are characterized by good fluidity and, at the same time, good processing behavior. In addition, in the case of a high amount of filler material they have a uniform surface and enable a coating with varnishes (powder).

Such moldable materials are suitable for the manufacture of liquid or gas conduction pipes, auto parts, kitchen elements, varnished molded bodies, legs of chairs and tables, exterior mirrors for cars and trucks, supports for such mirrors, luggage racks, handles of kitchen, gas pipes or gas ducts.

Examples

Component A / 1

Polybutyleneterephthalate with a viscosity index VZ of… ml / g (VZ measured in a solution of 0.5% by weight of phenol / o-dichlorobenzene), mixture of 1: 1 at 25 ˚C).

Component A / 2

Polybutyleneterephthalate with a viscosity VZ of 130 ml / g and a content of carboxyl groups of 25 mva / kg (VZ measured in a solution of 0.5% by weight of phenol / o-dichlorobenzene), mixed from 1: 1 to 25 ˚C according to ISO 1628), which contains 0.65% by weight, in relation to A / 2 of pentaerythrite tetrastearate (component D1).

Regulations for the manufacture of polycarbonates B1

General Work Instruction:

In a three-necked flask, fitted with a mixer, reflux condenser and internal thermometer, polyfunctional alcohol was mixed equimolarly with diethylcarbonate according to table 1 and 250 ppm of catalyst was added (in relation to the amount of alcohol ). The mixture was subsequently heated, while stirring, at 100 ° C, in the sample indicated with *, at 140 ° C, and stirred for two hours at that temperature. With a progressive reaction duration, the temperature of the reaction mixture was reduced, in turn, conditioned by evaporation cooling of the released monoalcohol which is initiated. The reflux condenser was then exchanged for a descending refrigerator, ethanol was distilled off and the temperature of the reaction mixture rose slowly to 160 ° C.

The ethanol extracted by distillation was collected in a round bottom refrigerated flask, weighed and the conversion was determined in percentage terms with respect to the total theoretical conversion possible (see table 1).

The reaction products were subsequently analyzed by gel permeation chromatography, the eluent was dimethylacetamide, polymethyl methacrylate (PMMA) was used as standard.

Table 1

Alcohol

catalyst Distillation product Amount of ethanol in relation With the total conversion [% in mol] Molecular Weight Mw Mn Viscos 23 ˚C [mPas] Index [mg KOH / g] OH of

B

TMP x 1.2 PO K2CO3 70 2100 1500 7200 461

TMF = ^ trimethylolpropane PO = ^ propylene oxide

Component C Glass fibers with an average thickness of 10 mm (epoxy-silanized lubricant)

5 Component D / 2 Lot of 25% soot in component A / 2 Components A) to D) were mixed in a twin screw extruder at 250 to 260 ˚C and extruded in a

Water bath. After granulation and drying, sample bodies were injected into an injection molding machine, and evaluated.

10 The granulate was injection molded into evaluation bars according to ISO 527-2 and a tensile test was performed. In addition, the impact resistance according to ISO 179-2 was determined, and the viscosity (solvent for PBT conforming to DIN 53728 phenol / 1,2-dichlorobenzene (1: 1) ISO 1628), MVR (ISO 1133) and viscoelasticity

The CCD (dynamic differential calorimetry) analysis was performed according to ISO 11357 (steps 20 K), formal heat resistance (HDT) was determined according to ISO 75 A and B and density, according to ISO 11833. 15 Spiral test : The spiral of flow with 2 mm thickness according to the tool T7 to determine the length of the flow path in cm. The compositions according to the invention and the results of the measurements can be taken from table 2. Table 2

Composition [% by weight]

Example 1V one

A / 1

26.80 27.00

A / 2

14.60 14.40

B

- 0.60

C

50.00 50.00

D / 1

0.60 -

D / 2

8.00 8.00

MVR 250˚ / 10 kg

cm 3/10 ’ 26 44

(continuation)

Composition [% by weight]

Example 1V one

CDD analysis

TM1 / TSP1

C 218.5 / 243.5 217.7 / 243.3

1. Heating.

H J / g twenty 20,798

TM2 / TSP2

C 210.5 / 225 211.8

2. Heating.

H J / g eleven 8,436

TKB / Tko

C 188 173

TKM / TKP

C 170.9 154.9

Hwb

C eleven 13.3

Controls:

unity MW

Density

MW g / cm3 1,7602 1,7642

ISO 179/1 eU impact

23 ˚C kJ / m2 59.3 53.7

ISO 179/1 eU impact

-30˚C kJ / m2 60.3 55.4

ISO 179/1 eA impact

23 ˚C kJ / m2 9.34 9.9

ISO 75˚ HDT

C 184.8 199.7

ISO 75B HDT

C 219.1 220.5

Tensile test:

Module E: MPa 17246 16591

Tension a

traction MPa - -

max.

MPa 158.68 154.08

break

MPa 158.68 154.08

Spiral test T7 2 mm

2. 3 47

Tensile test: ISO 527-1

Module E: MPa 17246 16591

Tension a

traction MPa - -

max.

MPa 158.68 154.08

break

MPa 158.68 154.08

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Claims (9)

1. Use of thermoplastic moldable materials containing A) 10 to 89% by weight of a polyethylene terephthalate which may contain up to 65% by weight with respect to 100% by weight of A), of another polyester. B) 0.01 to 50% by weight B1) at least one highly branched or hyperbranched polycarbonate with an OH number of 1 to 600 mg KOH / g of polycarbonate (according to DIN 53240, part 2), or B2) at least one highly branched or hyperbranched polyester of the AxBy type in which x has a value of at least 1.1 e and at least 2.1, or mixtures thereof C) 10 to 60% by weight of filler material in the form of fibers or particles, D) 0 to 20% by weight of other additional substances, where the sum of the percentages by weight of components A) to D) is a total of 100%, to obtain molded bodies by means of an internal pressure process of gas and / or a water injection process.

2.

Use of thermoplastic moldable materials according to claim 1, wherein component B1) has a numerical average of the molecular weight Mn of 100 to 15,000 g / mol.

3.

Thermoplastic moldable materials according to claim 1 or 2, wherein component B1) has a glass transition temperature of -80 ˚C to 140 ˚C.

Four.

Use of thermoplastic moldable materials according to claims 1 to 3, in which its component B1) has a viscosity (mPas) at 23 ° C of 50 to 200000 (according to DIN 53019).

5.

Use of thermoplastic moldable materials according to claims 1 to 4, wherein component B2) has a numerical average of the molecular weight Mn of 300 to 30,000 g / mol.

6.

Use of thermoplastic moldable materials according to claims 1 to 5, wherein component B2) has a glass transition temperature -50 50C to 140 ˚C.

7.

Use of thermoplastic moldable materials according to claims 1 to 6, wherein its component B2) has an OH index (according to DIN 53240) of 0 to 600 mg of KOH / g of polyester.

8.

Use of thermoplastic moldable materials according to claims 1 to 7 to obtain conductive tubes of liquids or gas, automobile components, kitchen furniture and varnished molded bodies.

9.

Use of thermoplastic moldable materials according to claim 8 for the manufacture of luggage racks, kitchen handles, water pipes, kitchen elements, chairs, table legs, rods, profiles, exterior mirrors and their suspension elements, gas tubes or gas ducts